Electric horn.



G. BLUMBERG AND.J. A. dUTKUS.-

ELECTRIC HORN.

APPLICATION men ocr. 13. ms. RENEWED FEB. l. 1919.

l ,3 1 7, 1 28. Patented Sept. 23, 1919.

' any? 45% aw A z GUSTAV BLUMBERG- AND JOHN A. BUTK US, OF BALTIMORE, MARYLAND.

ELEULLRIC I EORN.

Specification of Letters ZPatent.

Patented se aaa, 1919.

Application filed October 13,1915, Serial No. 55,684. Renewed February 1, 1915. Serial No. 274,563.

To all whom it may concern Be it known that we, GUSTAV BLUMBERG and JOHN A. Burirus citizens of the United States, residing at Baltimore,.inthe State 01 Maryland, have invented certain new and useful Improvements in Electric Horns; and we do hereby declare the following to he a full clear, and exact description of the invention such as will enable others skilled in the art to which it appertains to make and use the same.

@111 invention relates to horns such as are vused on automobiles, launches, etc.

The object of our invention is to produce a horn of this type which is sounded by an electric motor and in which means are provided for adjusting the relative locations of the sound producing mechanism and the electric motor, so that the quality of the tone emitted may be changed to suit the user, and so that wear can readily be compensated for.

In the drawings Figure 1, is a perspective viewfof our improved horn showing; the motor attached; Fig. 2', is a plan view of our improved horn and motor. The horn is shown in section, one bearing of the motor is shown in section and part of one hearing support is broken away; 7

Fig. 3, is a view of the means by which the motor is attached to the horn looking in the direction of the arrow 3 in Fig. 2;

Fig. is a view of the tappet attached to the diaphragm or' the horn;

Fig. 5, is a perspective view of the ratchet wheel attached to the armature oi the motor; and

Fig. 6, is a diagrammatic view of the connegtions between the battery, motor, and contact maker, and also of the mechanical connections by which the direction of motion of the armature is reversed.

in the drawings 10 is a bracket which may be attached by bolts passing through the holes 11 to any suitable part of an automobile, launch, etc. Secured to thc hmckct 10 by screws such as 12 is a casing formed of a fiat portion 13 provided with a cylindrical flange 14 in the interior of which a ring such as 15 is secured by screws such as 16.

A diaphragm formed of a flat plate such as 17 provided with a cylindrical liang'xc such 1'8 rests against the ring 15, a reduced portion of said i.'i1'|, ;.15 being provided for the reception of the flange 18.

Another ring such as 19 provided with the chamfered portions such as 20-20 rests against the flat portion 17 of the diaphragm. A ring of paper or other suitable packing material such as 21 rests against the outer surface of the ring 19 and the flange 22 of the horn rests against the paper ring 21. Screws such as 23, secure the flange 22, paper ring 21, ring' 19 and the flat portion 20 of the diaphragm to the ring 15.

Formed integrally with the flange 22 is the conical portion 24 of the horn which extends forwardly and terminates in the flat portion 25 provided witha central hole. A cone such as 26 has its small end projecting through the hole in the flat portion 25 and on the inside of said portion 25 the cone 26 is provided with a flange 27 which is soldered to the inner side of the flat portion 25.

Thus the flat portion 17 of the diaphragm, the conical portion 24 and the cone 26 together form a resonating chamber.

To the rear side of the flat portion 17 of the diaphragm. the tappct 28 is secured by rivets passing through the holes 2.9. The tappct 28 is formed with the rearward extension 30 provided with a surface 31 which forms a somewhat acute angle with the flat portion 17 of the diaphragm, and with another surface 32 joining the surface 31 which forms a less acute angle with the flat portion 17 of the diaphragm than does the surface 31.

A flanged ring such as 33 is soldered in a central hole provided in the fiat portion 13 of the casing. Said ring 33 is provided with an intcriorly threaded hole in which is screwed the threaded portion 34 of the ball bearing 35. A out such as 36, provided with slots such as 37 for the reception of a spanner wrench, is screwed upon the threaded portion 34 ot' the ball hearing. The ball bearing is provided with a raceway in which revolve, halls such as 38 which serve to support undceutcr the concfil!) attached to the shaft 40 of the motor 41.

The hall bearing 35 is provided with brackets, one oi which is shown at 42, and the latter are secured to studs such as 43 which project from the field 44- of the motor. A face ratchet; wheel such as 45 is screwed 45 on the shai't40.

The motor 41 is provided with an armaplace thereon by the screws 56-56 which pass through slots 57-57 provided in the ture tfi having, a commutator 47 against which heal-brushes 48and 49. The brushes,

4S and 49 are each mounted in brush holders 50 and 51 and the latter aresecured respectively to semi circular plates 52 and- 53.

The plates 52 and 53 areinsulated from each.

other and from the support 54 to whichthey' are secured in any approved manner. The

support 5=l is revolublyanouhtedl'on' a. boss'- not shown on bracket 55 and is retained in bracket The bracket 55 issupportcd from the field magnet 44 by studs such'as 74,

A stud 58 is secured in, the bracket 55 and a brush mounted in 'ahole provided in the inner end of the stud 58- bears against one;

i 1 similar stu'd 59 is also mounted on the bracket but insulated therefrom, and.is, also provided ..witl1 a hole in its'inner end of the. semi-cireular plates 52 and 53.

in which is mounted a b'rush'which likewise bears against one of the. plates 52'and 53.

A lever such as GOis -for1ned integrally with the support 54 upon which isniounted I the sen'ii-circular plates 52'and 53.

All parts'of the'motor being the subject.

- of our application for U. S. Letters Patent Serial No. 55,685, filed October 13th, 1915,.

will not be further described and will not be,

7 claimed in this application.

Referring'to F g. 6, the-lever 6,0 is connected as by a link 61 with a lever 62.: The lever 62' is fulcrun'ied as at 63 upon any ap-' proved part of the auto or launch and is retained in contact with the stopfil by the spring 65. At the upper-end of the lever (32 there is moun'ted a block of insulating 3 on one of said 65' current of electricity will flow from thebatmaterial '66 .upon I the front of which is mounted the contact plate '67. A lever such as 68 isju-lcrunied-,'as Lb-(i9 upon the main lever GZ-and' a spring 70 keeps 'the'lever 8 in the position'shown-in Fig, 6.

The connections of our improved horn are as follows:,- I I One side of the battery 71 is connected to the insulated stud 59. The other side of the battery 71 is connected to the contact plate 67. By reason of the fact that the stud 58 is in electrical connection with the; bracket 55 and that the brush end" of he s id stud 5 bears on one ofthe plates 52 ors53,iivllile the brush in the insulated stud 59 also bears lates, 1t 1s evident that a tei'y 71 to thestud" 59 through the brush mounted in the studfifl, to the plate 53,- to

the brush 49, then to the commutator 47,-

-'brushes to reverse then through the'brush 4 8 to' t-hezplate 52,

through the plate. 5.2 to the brush mounted in the stud 58, and since said stud is in elec- I trical connection with the bracket '55 and the latter is in electrialconnection with the lever 60, the current will fiow'along the link 4 .l 4 I -Hence, it is evident that if the lever 68' is 61 to the lovers 62 and d8. I

pressed into contact with the plate 67 that the armature 48 will'revolve.

The connec-tionsare so 'arrangedfthat the motor will rex olve m such 'a directlon'asto,

bring the surface 31 of the tappct 28 against the surfaces such; as 72,o t' the ratchetwheel 45. (This will. give a tone of soft character,

because the vibrations] of. thediaphragni will be lss -violentthan. when they are efi'ect} ed in amanner hereinafter descrlbedi Whena piercing tone is desired from-"the horn, the "lever 68 J8 pushed against the coutact 67 with sufiicientforce to bring the lei er 62 away from the stop 64 and move the lever '60 sufficiently fararound to bring the plate 53 urlhejr thexstud 5, ,"ehd .the plate 52 under the stud 58;

0f the a'rinaturfi and will bring thes ur- This will'reverse thexlirtection. ofmotion face 32 against the surface-730i the-teeth.

of the ratchet" Wheel- 45, thus producing a;

direction to strike one .said faces, and

means for shiftinp the positionof said tie said wheel to strike theqotherofsaidfaces.

a' tappet, having two striking surt'a'rc es-there on, an electric motor.- nc'lndmgiarevolving shaft and brushesaa" toothed wheel on said I shaft, a casing for .sai (l.'. diapl1ragnn' means for supporting said motoron said casing, a

source of electricity, a --circuit closer Iarid direction of motion'ot connections tvherby'said toothed wheel'is eausedto'revolve to strike on'e'ofsaid snr faces, andx'ineans for reversing the 'li'rertion" of revolution o'f sa1d-whe el to.

other of'saidjfaces I II in testimonywher'eof,"we afiix our siginv Jenna. Burritos 2', The combination witlra diaphragm of,

I m strike the- 

